Bath apparatus



Nov. 27, 1934. v ,1. s. MARTIN 1,982,260

BATH APPARATUS Filed Sept. 30, 1931 5 Sheets-Sheet 1 20- Iv ze J. S. MARTIN Nov. 27, 1934.

BATH APPARATUS Filed Sept. 30, 1931 5 Sheets-Sheet 2 I In/pento@ Nov. 27, 1934. J. s1 MARTIN 1,982,260

BATH APPARATUS Filed Sept- 30, 1931 3 Sheets-Sheet 5 Patented Nov. 27, 1934 UNITED STATES.

PATNT OFFICE 1,982,260 BATH APPARATUS Application september' 30,1931, seria1N0.5s6,105`

34 Claims.

This invention relates to bath apparatus of the type employed in administering fluid massage treatments that have a stimulating Vand healthful effect.

In prior applications, as for example the application of John S. Martin, Serial No. 517,089, filed February 19, 1931, there is disclosed a uid massage apparatus embodying injector means whereby fiuidAjets, preferably comprising a mixture of a suitable liquid such as water and a suitable gas such as air, can be applied to the body of a patient to produce a vigorous, vibratory massage. The apparatus referred to is positioned with respect to the body of the patient so as to massage the desired part of the body and once positioned the region of application of the massage is fixed. This makes necessary frequent adjustment of the apparatus and movement of thepatient, or else the use of a large injector unit, in order to extend the application of the massage. Moreover, it is generally thought that the benefits of massage treatment are closely related with stimulation of circulation in the blood vessels near the surface ofthe body so that to produce the most beneficial results the massagel should be applied in such a direction as to cause the blood to flow through these vessels toward the heart. In most cases muscular exercise on the part ofthe patient is also very desirable, but often the patient is incapable of self-exercise and the enforcement of muscular exercise manually or by mechanical means is extremely painful. Fluid massage produced by the apparatus above referred to tends v to stimulate circulation in the blood Vessels, but as it is constantly applied to the same region of the body it does not have the desired effect of forcing the blood toward the heart. Moreover, adjustments of the relative positions of the apparatus and the body are necessary to, vary the region of application of the massage, `and the apparatus does not include any provision for enforcing muscular exercise by the patient.

One of the objects of this invention is to provide fluid massage apparatus whereby themassage may be movably applied to the body or in other words whereby the region of application of the massage is caused to progress from one part of the body to another. y

Another object is to provide fluid massage apparatus whereby the massaging effect is definitely to work theblood through the veins in the di'- rection of the heart.

A further object is to provide fluid massage'api paratus embodying movable injector means so constructed and `arranged that the massage-is applied to the body Ain one direction of movement of the injector means but not in another direction4 of movement thereof.

A further object is to provide a' means which enforces kmuscular movement or exercise without physical contact of the hand or of apparatus with'the body of a patient.

A still further object is to provide a fluid massage apparatus which is adapted to enforce movement of a part of the body of a patient to which the massage is applied.

Briefly stated, the invention includes the provision of a movably mounted injector unit and means for moving the same, so that the region' of application ofv the massage is causedto move without disturbing the apparatus or the patient. In` the preferred form hereinafter described,theI injector unit is caused to movein a reciprocatory path, and means are further provided for rendering the injector .unit ineffective in one direction of movement thereof; In this'way the region-of application of the fluid massageA is caused to progress' along the body of the patient in a direction to force the blood toward the heart, this action taking place in one direction of movement of the injector means, while during return; movement of the injector means no massage is applied to the'body. 'I'his intermittent action' of the injectorunitmay alsobe employed to' enforce muscular exercise. For example, a paralyzed arm is lifted by the force oi the jets during the effective period of movement of the unit and is allowedtofall again when the jets are ineffective. The result is a recurring massage treatment acting only in one direction and an enforced muscular movement.

Several embodiments of the invention have been illustrated in the accompanying drawings, but itV is to be expressly understood that said drawings are for purposes of Villustration only and are not to be construed as a definition of the limits of the invention, reference being had to the appended claims for this purpose.

In the drawings,

Fig. 1 is a side view of an apparatus embodying the invention;

Fig. 2 is aplan view of Fig. 1, parts being removed for the sake of clearness;

Fig. 3 is a longitudinal section taken on the line 3 3 of Fig. 2;

Fig. 4 is a section taken on the line 4*--4 of Fig. 2;

Fig. 5 is a section taken on the line 5--5 of Fig. 1;

Fig. 6 is a somewhat diagrammatic section taken on the line 6 6 of Fig. 5;

Fig. 7 is a perspective view of a valve operating mechanism;

Fig. 8 illustrates another apparatus embodying the invention;

Fig. 9 is a'plan View in section of the apparatus shown in Fig. 6;

Fig. 10 is a section taken on the line 10-10 of Fig. 8;

Fig. 11 is a side elevation of another apparatus embodying the invention;

Fig. 12 is a bottom plan View of Fig. 11;

Fig. 13 is a section taken on the line 13--13 of Fig. 12;

Fig. 14 is a section taken on the line 14-14 of Fig. 11; and

Fig. 15 is a sectional View of `a valve and operating mechanism therefor.

Referring iirst to the apparatus shown in Figs. 1g to 7, inclusive, the injector unit is movably mounted -in a frame of any suitable type. In the form shown, aplate l of ymetal or other suitable material is provided with a plurality of supporting legs-2 and with a plurality of elongated slots 3. Where the framel is'formed of metal, the legs 2 and the slotsfk may be formed by a stamping opn eration, the material stamped-out lto form the slots'being struck down as 'shown at 4 in Fig. 5 so as to form rounded edges and the legs 2 termie nating in'suitable feet5 which may be of `rubber or other suitable material'. It will be understood that the entireside portions of the plate 1 maybe bent down to form supporting `iianges extending the entire length of the plate instead of the legs 2. lVl'ovably mounted infthe frame isr anvinjector unit of any suitabletype. In the form shown, the

injector unit is of theftype' describedin theprior` application abovel referred to and' is `illustrated in detail in Figs. 5 and 6." A manifold 6, to which air or other gas may be conducted as hereinafterv fromy the manifold 9 through the tubes 10 and the gas owing from the manifold 6 through the tubes: 7 are mixed and ejected inthe form of jets. Re*r ferring to Fig. 5, nozzles 11 are secured in suitable openings formedin the outer tubes 7, said nozzles preferablyextending movably between the struck-'down portions 4 of the plate 1. kNozzles 12 are securedin4 suitable openings formed in the inner tubeslc, said nozzles 1.2 extending concen-'f trically `within thenozzle's 11. The liquid from the tubes 10, which is preferably under pressure,

f is expelled through the nozzles 12 and 11 and the liquid jets entrain the gasfroni'the tubes. 7 "so that the jets from the injector: unit comprise a' mixture of liquid and gas-and produce ajvigorous vibratory massageton the body of the patient.

,y It will be understood 'that if desired the liquid and for reciprocation in the frame and Whlej'any suitable means may be provided for moving the injector unit, the preferred form comprises a. fluid operated means driven by the same liquid (or gas) which supplies the injector manifolds. In the form shown in Figs. 1 to 7, the injector unit is driven by a fluid operated motor of a type which makes it unnecessary to provide moving connections such as flexible hose to supply the fluid to the injector manifolds. Referring particularly to Fig. 3, a tube 13 is secured to the manifold 6, said tube being provided with an extension 14 passing through the manifold 6 and communicating with the manifold 9. The tube 13 is concentric with and adapted to slide within a stationary cuter tube 15 to which is secured a stationary valve casing 16 having an inlet connection 17 whereby a suitable liquid such as water is supplied to the apparatus, said liquid passing into the telescoping tubes 13 and force the inner tube 13 out of the tube 15 or in other words toward the left as shown in the drawings, said tube. 13 carrying with it the injector unit comprising the manifolds 6 and 9 and the tubes 7 and 10. During this movement of the injector unit, liquidis supplied to the nozzles 11 and 12 and these nozzles travelalong the elongated slots 3 in the table 1. At the same time air is supplied to the nozzles preferably by means of telescoping tubes 20 and 21, the inner tube 20 being secured to the manifold 6 and the s i outer `tube 21 being secured to the stationary bracket 18 and having a suitable connection 22 with a source of gas or air. It will be seen that during movementv of the injector unit in this directionthe jets are lin action and that if the armv-of-a patient, forexample, is laid on the tablel the regionfofapplication of the massage can be causedito progressup. the arm and to stimulate circulation while at ythe same time forcing thebloodgtowardthe heart. l

When theftravel of ythe-injector unit has been i completed, meansgare provided .for returningthe sameto its initial position as shown in the .draw-g ings and preferably the uid jets are rendered in-v effective at the-.same time. Referring particu- 11,3.

larly to Fig. 3,y a tube or Lrod23 is positionedr Within theY telescoping. tube 13, one end ofy said rod 23 being providedwith an arm 24 whichr extendsoutwardly through the end of the tube -13` and can be fixed in any desired adjusted position U by suitable meanssuch asset screws-25.k The other end of the tube 23 is providedwith ahead 26 against which bears one end of a coil .spring` 27. The other end of spring 27 bears against'a spring seatv 28 Which is ymovable Within thel tube 13 and alsowith respect to the rod 23. y.An cuter coil spring 29 is secured at one 4vend tothe spring seat 2,3 in, any 4suitable manner .as by soldering orwelding and is connected at its other end to a plate y30 which ils-anchored in the stationj ary tube 15 by means of a pin 31. During the travel of the injector. unit described above, the, rod234 is carried .outwardly with the tube 13 so that the head 26 of said rod compresses theI springv 27 against the spring seat 28and thereby in turn tensions the outer spring 29. Springs 2744 and 294 are thus effectivez together to resist the* above described movement of the injector. unit under theaction of liquid pressure and when the ,pressure y,is yshut off the springs return the CTI useaaoo injectorun'it' tot the position. shown in' the draw` ings. The actionl of the' springsV isto.` r'et'ard the movementl of the injector unit in the directioniin which the-i fluid jets arev in action, so that the progression' of. the' region` `of applicationA of the' massage isi gradual, and thereafter to' return-the injector unit to its initial position. quickly as soon` asT the liquidpressure is shut off. It willY be seen that a single spring may be employed' if. de; desired, but two springs acting serially are desirable because inthis: way excessive changes in the length `of the springs and excessive` forcesI are avoided:` Any suitable valve mechanism may be employed for shutting oil.` the liquid pressure asvsoon as the injector unit reaches: the end of its effective stroke. In the form shown, a'. rotatable'sleeve valve 32- is mountedl in-thevaive casing 16 and is provided with' indexing portsV 3-3 whereby commu,- nication is established in oneposition of the valve between the inlet connection 17- and the tube 15.

'I'he' sleeve valve 32A is rotated by suitable means operated by movement of the injector unit between the open positionA above described andv a closed position in which the liquid supply tothe iiuid4 motor and injector unit is substantially shut off. Referring particularly to Figs. 2, 4 and 7, an operating rod' 34extends slidably through an opening in a bracket 3'5 carried by a stationary i part of the mechanism and through arr openingin the endof plate 3 of the injector unit. Stop collars36 and 37 are adjustably secured to the rod' 34 so. thatsaid rod is actuated in one direction or the other by the end plate 8- of the injector unit.

The movement of rod 34 is employed to control a valve operating mechanism which preferably embodies av resiliently actuated means for rotating the sleeve valve 32 between its openn and closed positions; Referring to Figs; 2 and 7, one endof the rod 34` is connected at 38 withi an oper ating lever 39 pivoted at 40C onr thev val-ve casing 16; A second lever 4l is pivoted at 42 on the valve casing 16, the adjacent ends `of the levers 39 andA 41 being provided with meshing gear teeth 43. Levers 39 and 41 are also connected by a tension spring 44 which tends to throw the two levers between two limiting positions dening the open and closed positions of the valve 32. Referring to Figs. 4 and 7, lever 39 is provided with an arm having` an elongatedy slot 46 in which engages a pin 47 on the end of an arm 48 secured to the valve operating shaft 49.` As the injector unit reaches the end of its outward movement, the plate 8 engagesV the stop 36 and moves the rod 34.- gradually swinging the levers'- 39y and 41 about their pivots-until the coily spring 44 crosses the line of centers 40,- 42. During this swinging movement of the levers. the valve 32 is not actuated because of the lost motion provided by slot 46. As soon as the spring 44 crosses the line of centers. levers 39 and 41 are snapped to their other limiting positioneand the'valve. 32 is rotated instantaneously to closed position; The limiting positions of levers 39 and 41 may beidefined in any suitable manner as by means of a stop 50 (Fig. 4) secured to a stationary part of the apparatus and adapted to be engaged by a pair of lugs 51 on the lower end ofthe valve operating arm 48.

As soon as the valve is closed, springs 27 and 29 return the injector unit to the position shown in the drawings whereupon the plate 8 actuates the stop 37 and moves the rod 34,` the levers 39 and 4l and the springl 44 acting to return the valve to open position'. Durin'gthis return'm'ove-f ment of the injector unit, the jets are' inactive because the fluid supply isl shut oi and the tubesA 7 and manifold 6` tend' to ll up@ with water en'- tering through the jet tubes, particularly when the supply of air or gas is not under pressure'.-

Preferably therefore, the valve 32 does not corne'` pletelyclose but leaves a small opening to provide;

justsuicient passage of liquid under pressure`V to the jets to keep them in operation to prevent water-from lling up the tubes 7 and manifold 6.

Duringl a period of operation of the apparatus theI successive rapid' closingsv of the valve 32 will, cause a varying pressure to be set up inthe inlet connection 17 whichy may build up momentarily beyond desirable-maximum. Accordingly pres-v sure` unloadingA means are preferably embodied in` the apparatus which may be` of any suitable: type. As shown in Fig. 6; the end of the valve casing 16 is threaded and receives a hollow nut member 52. A valveseat 53 is formedinthe Valve casing` and is normally closed by a valve member 54 urged into engagement with saidseat tionary tube 57 is secured to the bracket'v18hin any suitable manner as by means of afnut 58' (Fig. 4). Arod 59 extends slidably through one end of the tubeand is connectedat 60 with the movable` manifold 6 of the injector unit. A piston memberfl isi carried'y by rod 59 within a tube 5.7, and the escape of iluid from opposite sides` of the piston takes place through discharge passages 62 controlled by needle valves 63. By regulatingthe setting'of the needle valve, the speed of travel of the injector unit in either direction can b'e regulated as desired.. v

It will be seen that las the injector u'nit reciprocate's, the jets are effective in one direction of movement to` provide a rnas'sag'ingl action and to stimulate circulation, forcing the blood in oneO direction, while during the return movement of an' injector unit the` j`ets are inactive.v This irl-- termittent action ofthe jets likewise 'enforces' muscular action of the part of the body of .the patient which is under treatment. For exanfiple,4 if the arm of a patient is laid on the' table 1, the jets not only produce a powerful vibrator'y massage but also lift the arm bodily off the table. During the return movement of the injector unit the jets are inactive and the arm of the patient falls backloy` its own weight to the'table. It

will' be understood that the apparatus is intended to be used under water, as in a bathtub or pool so that the result is to enforce an easy regular movement or exercise of the arm or other'part of the patient being treated, the arm being moved` those described above except that six slots areV 40 back and forth without any actual contact of 1 provided in the table as shown in Fig. 10 and six sets of injector tubes are employed. Referring to Figs. 9 and 10, the apparatus comprises a table 64 provided with six elongated slots 65. The injector unit comprises a manifold 66 to which are connected six tubes 67 and a second manifold 68 to which are connected six tubes 69 extending within the tubes 67, the sets of tubes being provided with jets 70 as described above and being closed at their ends remote from the manifolds. In this unit, in order to provide greater operating power and to insure against binding of the telescoping parts constituting the iiuid motor and fluid supply means, two stationary tubes 71 are provided at opposite sides of the apparatus, said tubes beingsecured to a stationary transverse header 72 that is secured to the plate 64. in any suitable manner. The injector unit carriesr two inner tubes 73 which slide within the tubes 71, said tubes 73 being provided with extensions 74 passing through the manifold 66 and communicating with the manifold 68. Air may be supplied to the manifold` 66 by means of a tube 75 connected to and communicating with the manifold and an outer stationary tube 76 which is secured to the stationary header 72 and is provided with an inlet opening 77.

Each kof the fluid motors embodies a single coil spring 78 which is connected at one end by means of a member 79 with the stationary tube 71 and at the other end with a rod 80 which extends through the manifolds 66 and 68 and is provided withl a lock nut 81. A liquid such as water is supplied to the stationary header 72 through a suitable inlet opening and passes through the two fluid motors 71, 73 to the manifold 68 and thus through the tubes 69 and jets 70, while at the same time the gas passes through the manifold 66, tubes 67 and jets 70. The tendency of the liquid pressure is to force the injector unit outwardly against the tension of springs 78, during which movement the jets are active, and when the liquid pressure is shut off, the springs 78 return the injector unit to the position shown in the drawings. This movement of the injector unit may, if desired, be guided by rods 82 secured to the frame 64. It will be understood that the fluid motors may embody resilient means as described in connection with Fig. 3 if desired.

Preferably a single valve is employed to control the supply of liquidto the apparatus. As shown in Fig. 9, this valve is in the form of a sleeve 83 which is slidable in the transverse stationary header 72 and is provided with a port 84 registering in the position of Fig. 9 with the open end of one of the tubes 73, the valve terminating short of the open end of the other tube 73. A valve operating rod 85 is suitably connected at 86 with the valve sleeves and extends outwardly through the end of the header, terminating in a head 87. Suitably secured to the movable injector unit is an arm or bracket 88 carrying arod 89 on which are formed two cam surfaces 90 and 91. As the injector unit moves outwardly or to the left as seen in Fig. 9, the rod 89 moves with it and the cam surface 91 engages the head 87 as the injector unit reaches the end of its stroke and pushes the head 87 and valve inwardly to the dotted line position shown in Fig. 9,

v thereby shutting off the liquid supply to the fluid motors except for a slight leakage to keep the jets open. When the injector unit has been returned to normal position, the cam surface 90 is effective to return the valve to the position shown 1 in the drawings by virtue of its engagement with the head`87.. Preferably'a spring 92 is provided to maintain the valve member in either of its limiting positions.

As shown in Fig. 8, the apparatus may be used in the bottom of e bathtube, the liquid inlet 80 82 being connected with the water spigot 94 in any suitable manner as by means of the hose 95 and the air inlet 77 being connected with the atmosphere through a vsuitable hose 96. In use, the tub should preferably be kept sued with water 85 above the level of the cover plate 64. It will be understood that the apparatus shown in Figs. 1` to 7 inclusive is preferably used inthe same' manner.

Figs. 11 -to 15, inclusive, illustrate lanother appa- 90 ratus wherein a different type of operating motor is employed. "The cover! .plate or frame 97 i's preferably the same as the cover plate 1 and the' injectorunitcomprise's 'a liquid manifold 98 and tubes 99, a gas manifold 100 and tubes 101, and 95. a plurality of jets 102, 103 as shown in Fig. 13,- this unit being vslidably mounted on supporting guide rods 104; Gas is' supplied to the manifold 100 by a flexible hose 105, and liquid is supplied to the manifold 98through a valve 106 carried 100 on the end of said manifold and through a flexi-l ble hose 107. The structure of'valve 106 is shown more clearly in Fig. 15, said valve comprising a sleeve 108 having a port 109 adapted to one position to registerwith the end of the'manifold tube 105 98. 'A valve operating rod` 110 is pivotally secured at 111 to the sleeve 108, said rod extending outwardly through the end of the .valve casingY and between suitable friction blocks 112 (Fig. 12).

As shown in Fig. 12, the injector unit has reached the end of its effective stroke duringwhich the valve has been held in the positionshown in' Fig'. 15 by the friction blocks 112 and rod 110. The position of the valve may be controlled by suitable means such as a stop collar` 113 secured 115 to the rod 110. As the injector unit begins its return stroke, the friction blocks 112 retard the rod 110 and the valve sleeve 108 is moved relative to the valve casing 106 until the port 109 no longer registers with the end of the manifold 120 tube 98 except for a slight opening to permit sufficient leakage to keep the jets 102, 103 clear of water. Accordingly itl will be seen that thel jets are 'effective only in one direction of movement of the injector unit. 125

The injector unit is reciprocated by means of va fluid motor 114 of any suitable type, said motor having a fluid inlet connection 115 which may lead to the same source to which thehose 107 is connected and also with a fluid outlet 116. 130 rIhe reciprocating piston rod 117 of the motor 114 is connected by a rod 118 with a vlink 119 pivoted at 120', and the endof the link 119 is. connected by a rod 121 with the injector unit at 122. The use of the rod 118, link 119 and rod 121 makes 135 it possible where necessary to adjust the length of the` stroke of the injector unit.

It' will be understood that the invention is not limited to the particular form of injector unitI illustrated and described. Any suitable injector` M0 means may be employed which produces the desired massaging action, but best results have been obtained with a jet comprising a mixture of liquid and gas. Moreover, the invention is not limited 7 to the two forms of operating motors which have l "5 been illustrated and described, as any other suitable type of fluid motor may be substituted therefor and many of the advantages of the invention will be obtained with thev use of a motor operated by ,4 .M other means than fluid pressure. The apparatus t need not be portable, nor adapted for use in vthe usual bathtub, but may be embodied in permanent installations in hospitals and the like..

Many advantages are likewise vobtained by having the injector unit movable but without provision for shutting olf the `jets in one direction of movement. Reference is therefore to be had to the appended claims for a deilnition of the limits of and control means actuated by movement of said.

injector means automatically controlling the action of said injector moving means and said injector means.

2. In fluid massage apparatus'of the class described, `the combination of injector means for discharging iluid jets, means for supplying iluid thereto, fluid means for reciprocating said injector meanswhereby the region of application of the jets to the body of a patient is caused to progress in a desired direction, a source of iluid common to said injector` means and said injector moving means, and control means actuated by movement of said injector means automatically controlling the action of said injector moving means and said injector means.

3. In fluid massage apparatus, the combination of injector means for discharging fluid jets, means for supplying fluid thereto, means for moving said injector means with source of power common with said injector means to cause the region of application of the jets to move in one direction, and means common to said injector means and said injector moving means actuated by movement of said injector means for shutting off the fluid supply When the injector means moves in another direction.

4. In iluid massage apparatus, the combination of injector means mounted for reciprocationand adapted to discharge Iluid jets, fluid meansfor reciprocating said injector means with fluid supplied from a common source with said injector means, and valve means actuated by movement of saidinjector means for shutting olf the .fluid supply in one direction of movement of said injector means.

5. In fluid massage apparatus, the combination' of injector means for discharging iluid jets, fluid operated means supplied with a common source -with said injector means for moving said injector means translationally whereby the region of application of the jets to the body of a patient is i jector means translationally, means for supplying fluid to said injector means and to said iluid operated means from a common source of supply, and a common valve control means for said supplying means- 7. In` fluid massage apparatus, the combinationof injector means,f1uid operated means for moving said injector means, means for `supplying fluid to said injector means and to said iluid operated means from a common source, means actuated by movement of said injector means for intermittently shuttingof the-fluid supply, and means for moving said injector means when the fluid supply is shut oil. i

8. In fluid massage apparatus, the .combination of injector means, fluid operated means for moving'said injector means, means for supplyinguid to said injector means and to said fluid operated means from a common source, a spring opposing movement of said injector means in one direction, and means for shutting ofthe-iluid supply whereby said spring moves said injector means in the opposite direction. v

9. In fluid massage apparatus, the combinationV of a frame having a cover plate provided with elongated openings, an injector unit movably mounted on said frame and having iiuid jet means 4discharging through said openings, a fluid motor for moving said injector unit, and means for supplying fluid to said injector unit and to said motor.

10. In fluid massage, apparatus, the combination of a frame having a cover plate provided with elongated openings, an injector unit movably mounted on said frame and having fluid j etmeans `discharging through said openings, a fluid motor for moving said injector unit, means for supplying iluid to said injector unit and to said motor, and valve means for shutting off the fluid supply to said injector unit.

1,1. In fluid massage apparatus, a frame having a cover plate provided with openings, an injector .unit movably mounted on the frame and having fluid jet means discharging 'through said openings, a uid motor yfor lmoving said injector unit, an adjustable connection between said motor and injector unit yto vary the length of travel of the latter, and means for supplying fluid` to` said injector unit and to said motor.

12. In fluid massage apparatus, a frame having a cover plate provided with openings, an injector unit movably mounted on the frame andhaving fluid jet means discharging through said openings, a iluid motor for moving said injector unit, means for supplyingfluidto said injector unit .and tosaid motor, a valvecarried by said' injector unit for ,controlling the `fluid supply'tov Asaid injector unit, and a valve stem having frictional engagement with said frame, whereby said valve is open in one` direction of movement of the in'- jector unitonly. I

13. In apparatus of the jclass described, the combination of a stationarymemberMa second member movable therein, said members constitutingan expansible chamber, means for supplying. fluid under pressure to said chamber to move vsaid second member in one direction, resilient means opposing such movement, means for shutting off the fluid supply whereby said resilient means moves said second member in the opposite direction, an injector unit movable with said second member, and means iorsupplying fluid to said injector unit. r j

14. Apparatus of the class described comprising a movable injector unit, means for supplying liquid and gas thereto, and fluid pressure operated means for moving said injector unit comprising `a pair of telescoping tubes one of which is stationary andthe other of which is movable and connected to said injector unit, a spring Within and connecting said tubes, means connectreo ing said tubes kwith a'source of fluid pressure to move said movable tube in one direction, and means for preventing communication between said source and tubes whereby said spring moves said movable tube in the other direction.

15. Apparatus of the class described comprising a movable injector unit, means for supplying fluid thereto, and :tiuid pressure operated means for moving said injector unit comprising a pair 'of telescoping tubes one of which is stationary Aand the other of which is movable and connected to said unit, a spring within and connecting said tubes, a conduit connecting said tubes with a sourcel of fluid pressure, and valve means operated by movement of said unit and tube for controlling said conduit.

16. Apparatus of the class described comprising a stationary member, a second member slidable therein, said members constituting an expansible chamber, means for supplying fluid under pressure thereto whereby said second member is moved in one direction, resilient means opposing such movement, valve means controlling the fluid supply and operated by movement of said second member to shut off the fluid supply whereby said resilient means moves said second member in the opposite direction, an injector unit movable with said slidable member, and means for supplying iluid to said injector unit.

17. Apparatus of the class described comprising a stationary member, a second member slidable therein and constituting therewith an expansible chamber, means for connecting said chamber with a source of luid under pressure whereby said second member is moved in one direction, resilient means opposing such movement, an injector unit movable with said second member, means connecting said injector unit with a source of iluid, and means for shutting off the fluid supply to said injector unit and to -said chamber whereby said resilient means moves said unit lin the opposite direction.

18. Apparatus of the class described comprising a pair of telescoping tubes constituting an expansible chamber, one of said tubes being stationary and the other movable, 'a' spring within and connecting said tubes, means for supplying fluid under pressure to said chamber whereby the movable tube is moved in one direction against the -tensionof said spring, an injector unit movable with said tube, means lfor supplying fluid to said injector unit and to said chamber, and means for shutting off the iluid supply to said chamber and to said unit whereby said spring moves the movable tube in the opposite direction.

19. Apparatus of the class described comprising a stationary member, a second member slidable therein and constituting therewith an expansible chamber, means connecting said chamber with a source of fluid under pressure whereby said second member is moved in one direction, resilient means opposing such movement, an injector unit movable with said second member, means connecting said injector urnt to said source of fluid supply, and valve means controlling the fluid 1 supply to said injector unit and to said chamber andA connectingsaid tubes, a conduit connecting said chamber with a source of fluid under pressure, a conduit connecting said chamber with said injector unit, and a valve in said rst named conduit operated on movement of said tube and injector unit to shut off the iluid supply.

21. Apparatus of the class described comprising a stationary member, a second member slidable therein and constituting therewith an expansible chamber, means for connecting said chamber with a source of uid under pressure whereby said second member is moved in one direction, resilient means opposing such movement, an injector unit movable with said second member, means connecting said injector unit with a source of fluid, and valve means controlling the supply of fluid to said chamber and to said injector unit, said valve means when in closed position providing sufcient leakage of fluid to said injector unit to keep the injector jets open.

22. Apparatusof the class described comprising a pair of telescoping tubes constituting an expansible chamber, one of said tubes being stationary and the other movable, a spring within and connecting said tubes, means connecting said chamber with a source of fluid under pressure, an injector unit movable with said movable tube, a iluid connection from said chamber to said injector unit, a valve operated on movement of said injector unit in one direction to shut ofi said fluid supply, a second pair of telescoping tubes one of which is stationary and the other of which ismovable with said injector unit, a connection from said injector unit to said second pair of tubes, and

means connecting said second pair of tubes with L another source of iluid.

23'. Apparatus of the class described comprising a pair of telescoping tubes constituting an expansible chamber, one of said tubes being stationary and the other movable, a spring within and connecting said tubes, means connecting said chamber with a source of fluid under pressure, an injector unit movable with said movable tubefa fluid connection from said chamber to said injector unit, a valve operated on movement of said injector unit in one direction to shut off said fluid supply, a second pair of telescoping tubes one of which is stationary and the other of which is movable with said injector unit, a connection from said injector unit to said second pair of tubes, and means connecting said second pair of tubes with another source of fluid, said valve when operated to closed position providing fluid leakage to said injector unit sufficient to keep the injector jets open. f

24. Apparatus of the class described comprising a pair of spaced iluid motors each comprising a pair of telescoping tubes one of which is stationary and the other movable, springs within and connecting the tubes of each motor, a header connected with a source of iluid under pressure and having ports communicating with each of said motors, an injector unit, fluid connections from each of said motorsto said injector unit, a Valve controlling said parts and operated on movement of said unit to shut ol the fluid supply to said motors, a third pair of telescoping tubes `positioned between said motors, one of said third pair beingmovable and connected with said unitand the other being stationary, and means connecting saidv last named stationary tube with another source of fluid.

25.111 fluid massage apparatus, the combination of injector means for discharging fluidjets, means 'forsupplyingnfluid thereto,iluid means for reciprocating said injector means, and uid means independent of said reciprocating means for controlling the rate of movement of said injector means independently in each direction.

26. In apparatus of the class described, the combination of an injector unit having means for discharging iiuid jets, means for supplying fluid thereto, means including a piston and cylinder for moving said injector unit, a stationary cylinder, a piston movable therein with said injector unit, and means for controlling the displacement of fluid by said piston to regulate the rate of movement of the same in said cylinder.

27. In fluid massage apparatus, the combination of a movable injector unit having means adapted to discharge fluid jets, a fluid motor for moving said unit, means for supplying fluid to said unit and to said motor, a valve controlling the supply of fluid to said motor, an operating meinber movable with said unit and adapted to move said valve between different positions, and operative connections between said operating member and said valve including a lost motion connection.

28. In fiuid massage apparatus, the combination of a movable injector unit having means for discharging fluid jets, a uid motor for moving said unit, means for supplying the fluid to said unit and to said motor, and means for controlling the fluid supply comprising a valve, a trigger mechanism for moving said valve between different positions, and an operating member movable with said unit for controlling said mechanism.

29. In apparatus of the class described, the combination of a movable injector unit adapted to discharge fluid jets, a fluid motor for moving said unit, means for supplying fluid to said unit and to said motor, and means for controlling the fluid supply comprising a valve, a lever for moving said valve, a spring for swinging said lever between different positions, and an operating member movable with said unit for controlling the action of said spring.

30. In apparatus of' the class described, the combination of an injector unit adapted to discharge fluid jets, a fluid motor for moving said unit, means for supplying fluid to said unit and to said motor and means for controlling the fluid supply comprising a valve, a pair of pivotal levers having operative engagement at their adjacent ends, a spring connecting said levers at points outside their pivots, an operating member movable with said unit and connected with one of said levers whereby said spring is effective to swing said levers to either of two limiting positions, and operative connections including alost motion device between one of said levers and said valve.

31. In apparatus of the class described, the combination of a slotted bench, a movable injector unit adapted to discharge fluid jets through said slots, means for moving said unit, means for supplying fluid thereto, a valve actuated by movement of said injector unit for alternately shutting 01T the supply of fluid, and a relief valve in the supply line adjacent said controlling valve.

32. In apparatus of the class described, the combination of a slotted bench, a movable injector adapted to discharge fluid jets through said slots, means for supplying fluid thereto, valve means controlling the iiuid supply, valve operating mechanism actuated by movement of said injector unit whereby the uid supply is alternately shut off, and a relief valve associated with said valve means and adapted to open when the pressure exceeds a predetermined value.

33. In a uid massage apparatus, the combination of injector means, means for supplying fluid thereto, fluid operated means for moving the injector means and means for supplying fluid thereto, a pair of springs opposing movement of said injector means in one direction, one of said springs being in tension and the other being under compression, and means for shutting off the uid supply to said fluid operated means whereby said springs move the injector means in the opposite direction.

34. In uid massage apparatus, the combination of a movable injector unit, means for supplying uid thereto and a fluid motor for moving said unit comprising fiuid operated means for moving said unit in one direction, a pair of serially connected springs opposing such movement, one of said springs being in tension and the other under compression, and means for shutting voff the fluid `supply to said motor whereby said springs move said injector means in the opposite direction.

JOHN S. MARTIN. 

